DS1501 Datasheet, PDF (10/20 Pages) Dallas Semiconductor – Y2K-Compliant Watchdog Real-Time Clocks

Figure 8. Block Diagram
X1
32.768kHz CLOCK
OSCILLATOR
X2
CLOCK ALARM AND WATCHDOG
COUNTDOWN
DS1501/DS1511 Y2KC Watchdog Real-Time Clocks
IRQ
SQW
16 X 8
CLOCK AND CONTROL
REGISTERS
Dallas Semiconductor
DS1501/DS1511
256 x 8
NV SRAM
V_BAT
V _BAT
V_BAUX
GND
KS
POWER CONTROL
WRITE PROTECTION,
AND POWER-ON
RESET
A0–A4
DQ0–DQ7
CE
WE
OE
RST
PWR
Figure 9. Typical Crystal Layout
LOCAL GROUND PLANE (LAYER 2)
X1
CRYSTAL
X2
GND
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